:root {
  --color-primary: #6b2fa0;
  --color-primary-dark: #4a1f70;
  --color-primary-light: #f3edf9;
  --color-text: #333;
  --color-text-light: #666;
  --color-border: #e0e0e0;
  --color-bg: #fff;
  --color-bg-sidebar: #fafafa;
  --color-link: #6b2fa0;
  --sidebar-width: 280px;
  --header-height: 56px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

/* Header */
.help-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-primary);
  color: #fff;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.help-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 24px;
  max-width: 1400px;
  margin: 0 auto;
  gap: 12px;
}

/* Hamburger button */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  position: relative;
  z-index: 10;
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

.help-logo {
  color: #fff;
  text-decoration: none;
  font-size: 18px;
  font-weight: 600;
  white-space: nowrap;
}

.help-search {
  position: relative;
  width: 300px;
  flex-shrink: 0;
}

.help-search input {
  width: 100%;
  padding: 8px 12px;
  border: none;
  border-radius: 4px;
  font-size: 14px;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  outline: none;
  transition: background 0.2s;
}

.help-search input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.help-search input:focus {
  background: rgba(255, 255, 255, 0.95);
  color: var(--color-text);
}

.help-search input:focus::placeholder {
  color: var(--color-text-light);
}

/* Search Results */
.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 4px;
  background: var(--color-bg);
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  max-height: 400px;
  overflow-y: auto;
  z-index: 200;
}

.search-results a {
  display: block;
  padding: 10px 14px;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
}

.search-results a:hover {
  background: var(--color-primary-light);
}

.search-results a:last-child {
  border-bottom: none;
}

.search-results .no-results {
  padding: 10px 14px;
  color: var(--color-text-light);
  font-style: italic;
}

/* Body layout */
.help-body {
  display: flex;
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* Sidebar */
.help-sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  background: var(--color-bg-sidebar);
  border-right: 1px solid var(--color-border);
  padding: 16px 0;
}

.nav-list {
  list-style: none;
}

.nav-list > li {
  margin-bottom: 2px;
}

.nav-list > li > a {
  display: block;
  padding: 8px 20px;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: background 0.15s;
}

.nav-list > li > a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.nav-group-title {
  display: block;
  padding: 10px 20px 4px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-light);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-group-title:hover {
  color: var(--color-primary);
}

.nav-group ul {
  list-style: none;
}

.nav-group ul li a {
  display: block;
  padding: 5px 20px 5px 32px;
  color: var(--color-text);
  text-decoration: none;
  font-size: 14px;
  transition: background 0.15s;
}

.nav-group ul li a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.nav-group ul ul {
  list-style: none;
}

.nav-group ul ul li a {
  padding-left: 48px;
  font-size: 13px;
}

/* Active page highlighting */
.nav-list a[aria-current="page"] {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
  border-left: 3px solid var(--color-primary);
}

/* Main content */
.help-content {
  margin-left: var(--sidebar-width);
  padding: 32px 48px;
  max-width: 900px;
  width: 100%;
}

/* Breadcrumbs */
.breadcrumbs {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.breadcrumbs a {
  color: var(--color-link);
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  margin: 0 6px;
  color: var(--color-text-light);
}

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

.help-content h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-primary-dark);
  border-bottom: 2px solid var(--color-primary-light);
  padding-bottom: 12px;
}

.help-content h2 {
  font-size: 20px;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--color-text);
}

.help-content h3 {
  font-size: 17px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
}

.help-content h4 {
  font-size: 15px;
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 6px;
}

.help-content p {
  margin-bottom: 12px;
}

.help-content a {
  color: var(--color-link);
  text-decoration: none;
}

.help-content a:hover {
  text-decoration: underline;
}

.help-content ul,
.help-content ol {
  margin-bottom: 12px;
  padding-left: 24px;
}

.help-content li {
  margin-bottom: 6px;
}

.help-content li ul,
.help-content li ol {
  margin-top: 6px;
  margin-bottom: 0;
}

.help-content img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  margin: 12px 0;
}

.help-content blockquote {
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-light);
  padding: 12px 16px;
  margin: 16px 0;
  border-radius: 0 4px 4px 0;
}

.help-content blockquote p:last-child {
  margin-bottom: 0;
}

.help-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}

.help-content th,
.help-content td {
  border: 1px solid var(--color-border);
  padding: 8px 12px;
  text-align: left;
}

.help-content th {
  background: var(--color-primary-light);
  font-weight: 600;
}

.help-content code {
  background: #f4f4f4;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 13px;
}

/* Responsive */
@media (max-width: 900px) {
  .hamburger {
    display: flex;
  }

  .help-header-inner {
    padding: 0 12px;
  }

  .help-logo {
    font-size: 15px;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
    flex-shrink: 1;
  }

  .help-search {
    width: auto;
    flex: 1;
    min-width: 120px;
  }

  .search-results {
    position: fixed;
    left: 12px;
    right: 12px;
    top: var(--header-height);
    margin-top: 4px;
  }

  .help-sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    z-index: 90;
  }

  .help-sidebar.open {
    transform: translateX(0);
  }

  .help-content {
    margin-left: 0;
    padding: 24px 20px;
  }
}